28 Celebrities You Would Never Guess Are Vegan.

Biz Stone, co-founder of Twitter, went vegan after visiting the Farm Sanctuary.

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Paul McCartney, who has been vegan for many years, says “if slaughterhouses had glass walls, everyone would be a vegetarian.”

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Glee star Lea Michele decided to eliminate animal products from her diet for health purposes as well as animals rights.

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Alicia Silverstone went vegan after she saw the documentaries about the food industry. She also wrote the bookThe Kind Diet. Alicia says after she changed her diet she no longer suffered with asthma, puffy eyes, acne, insomnia and constipation.

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Joaquin Phoenix remembers the day when he became vegan, “I was 3 years old. To this day it is a vivid memory, my family and I were on a boat, catching fish … The animal went from a living, vibrant creature fighting for life to a violent death. I recognized it, as did my brothers and sisters.”

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Angela Bassett stays beautiful and healthy on a vegan diet.

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Pamela Anderson has been vegan and a spokesperson for PETA for many years.

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Usher became more focused on healthier eating in 2008, when his father died from a heart attack. He says being vegan is the healthiest way to live.

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Ellen DeGeneres switched to a vegan diet in 2008 after reading several books on animal rights and diets. “I do it because I love animals. And I saw the reality and I just couldn’t ignore it anymore.”

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Russell Brand watched “Forks Over Knives” and made the switch to a vegan diet in 2011.

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Gwyneth Paltrow has written a few cookbooks and has been vegan for several years.

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Alec Baldwin was diagnosed as pre-diabetic and changed his eating habits to improve his health. He’s also the voice on Meet Your Meat.

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Brad Pitt has been vegan for many years.

Avril Lavigne followed a vegan diet to help her slim down for her wedding.

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“Becoming a vegan gave me another opportunity to live a healthy life. I was so congested from all the drugs and bad cocaine, I could hardly breathe, [I had] high blood pressure, [was] almost dying [and had] arthritis. And once I became a vegan all that stuff diminished.” – Mike Tyson

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Even though he parties like it’s 1999, Prince is vegan.

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Steve-O cut cruelty out of his lifestyle and is now crazy for veggies.

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Kristen Bell didn’t like the taste or smell of meat when she was a young child and is still vegan.

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Jared Leto credits his vegan diet and yoga to his youthful appearance. He is 42 years old.

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Natalie Portman was a long time vegan until she got pregnant. Shortly after her child’s birth, she went back to veganism.

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Alanis Morissette lost 20 pounds after going vegan.

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Bill Clinton reversed his heart disease by switching to a vegan diet.

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Woody Harrelson has been animal and dairy free for 25 years. He’s also environmentally conscious. Woody lives on an organic farm in Maui with his family, refuses to use cell phones, and drives energy efficient cars. He also co-owns a vegan restaurant called Sage.

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Olivia Wilde has been vegetarian since she was 12 and has been vegan for the past 4 years.

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Anthony Kiedis, of the Red Hot Chili Peppers, says documentaries on factory farming convinced him change his ways and follow a vegan lifestyle.

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Singer Leona Lewis was awarded Sexiest Vegetarian of 2008 by PETA along with Anthony Kiedis. She’s planning to start a line of vegan clothing.